Issue 11 and Volume 143.

THE FLASHOVER “PHEHOMENON” EDITOR’S OPINION Flashover has been around since people began filling up semitight rooms with combustibles, but it was not until the mid-sixties to early seventies that we began to identify it as such. There’s a lot we still don’t know about it; in fact, there isn’t a concensus, standard definition of this deadly fire occurrence. Some express it in terms of thermal radiation feedback; others see it as a pivotal point in a fire’s growth; still others have attempted to describe it in terms of temperature over time or as a function of burning rate, room geometry, and ventilation. But the simplest, most practical, and most widely accepted way of describing flashover is that it’s what happens when the room gets so hot that all contents ignite simultaneously in a blast of intense fire and heat -full room involvement. Of course, it doesn’t matter how you try…

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